Pressure holding and dispensing container



Jan. 9, 1951 R. H. LINDSEY PRESSURE HOLDING AND DISPENSING CONTAINERFiled Dec. 9, 1946 l l lllllllrlll llll'l.

.JJ f M M a W, 2 M

Patented Jan. 9, 1951 UNITED sures PATENT QFFHCE p rationof MichiganApplicationlDec mber 9, 1946, Serial No. 714,963

2 ClaifiiSi"-('Cl. 299- 9 5) This'invention relates'tcithe art ofstoring a" substance'in aipressure holding'contain'er and dispensingthesubstance fromthe containenhy means'of'the pressure in the containeriOne example is that of charging a vessel' or container-"with a"-volatileliquid together with an insecticide; In a situation o'fthis'kind/theliquid form for which-purpose itinay b'e-reduced to a==lmvtemperatureiand then the "vessel is* closed-unsealed: In due course, the vessel and"the contents reach ordinary room *temperatures,"* at whichaternperatures the volati e liquid creates' a pressure-lathe vessel;andwhen'a smallport froin the time' 'ofthe initial charge until thevessel issubstantiaHy empty of the volatile liquid;

The' pres'entinven 'ion is concerned with the vessel or container forsubstances or combination of substances Ofitl'l' character above'recited; I It has been the practice.to provide'reatively expen'sive'scontainer's :for this purpose which were designedrlwiththe intent'thatfafter the charge in the containerissdispensed; the containeristo bere'urned to'the manufacturer or other plant for refillingii; 1,

The general object of th present invention' is'" to provide a simplevessel with a sealingand spraydevic'e for materials-Toff. the typementioned and which can be so cheaply manufactured that it iseconomically 'feasible to throw the container Fig. 2. ,is an enlargedcross sectional view taken,

substantially. on line 2-2. of .L showing the valving and sprayvdevices.

Fig. 3.is a top plan view of the vessel. ,,Fig. 4' is aperspective viewillus'rating the top f of the .vesseland demonstrating its manner of.

, use. i. volatile liquid-is charged into the container "in As shown inllig. 1,-the container is of cylin-' shape'for the container, acylindrical wall I wi=h a bottom wall 2 atone end of the cylind'ri-l.

sarily has the strength required to. hold the intile substance and thetap wallisipreferably 'de pressed. as shown to thereby provide a reces'sd'"- for accommodating the valve part and .spray part.

drical form, which is thought to be a convenient ll) may be. providedwith an opening defined by a.

* liquid .tightjoint. Thelower end of the tube. is

awayraftertthe contents have been-discharged; Of course, it is withinthe inventionato refill' the container if such is desired, but eveninthis case the initial manufacturing cost andinitial investment of theuser is reduced. 1

As anexampleofthe materialswhich maybe usediwith-ithe Coutainenreferencemight be made; to the "use 'of the substance, commonly known T as Freon;as ,the volatilecharge which provides the pressure-and serves. as thecarrier-for the insecticide which can bathe soecailed DDT which isbelieved to have been developed during the recent war. Of course, theinvention is not limitedi=itof anyz particulan materials nor, for thatmatter, is: it l'ifnited-to the spraying of an insecti cidecasi the'containerhmay bejf'used :icr spraying' open; as illustrated,andadiacent i.s.upper end, Q l but 'justjinside the top, the tube-isprovided with a smalllateral opening 8. It will be appreciated, ofcourse, that when terms such. as top or upperifor' bottom are used, thatthese are relative terms. This is the position the parts are shownin thedrawings when use, the con-' tainer will usually be somewhere near anuprightiposition; although'thls may not be' necessynthetic or.of'material similar to rubber.

example, by. being soldered, thus to provide a materia1,"'.which. maybetermed a packingQis and the tube Gpasses through the packing; The

upper end of the tube is screw threaded as atQIZ for the reception of acap M. This cap has an internal? chamber as illustrated, and provided isvvithintern'al threads for engagement with the 4 tube and the cap isarranged to abut against the packing ll. The'top of the cap is closedandis r designed .to freely receive-a valve member-prefer ablyin .theform of .a ball l5 arranged to seat in the u'ppe'hend of the tube whichmay hav an tively small passage 2| therethrough. The spray tube 20 has,preferably, a gas tight connection with the cap. If the cap it is amachined metal part, the spray tube 2!} may be soldered thereto;

if; the cap be a die casting the tube may be cast in position; if thecap is of molded plastic the tube 2!] may be molded to the cap.

" cal form and atop wall 3 'Tnisstructure neces- 1 ternal pressure whichis developed by the V012;- is opened; there' is' a discharge'of someliquidated a h: discharge carrying some of the insecticide. Thus', -theinsecticide'may be sprayed wherever d'esiredJ The pressureis maintained'in the vesseliin' a --substantia ly uniformimanner The spray tube 20, asshown in Figs. 2 and 3, extends laterally from the center position ofthe cap and is confined in the recess 4. Preferably, both the cap l andthe spray tube are disposed below the upper edge of the cylindrical wallof the container so that the parts are out of the way and protected innormal shipment and handling operations. As a safety factor, a lockingdevice, such as an abutment or small plate 26, may be secured to the topplate 3 and positioned to be engaged by the tube 20 to preventaccidental turning of the cap on its screw threads.

stance such as a volatile liquid carrier and an insecticide, a tubeextending through a wall of the container and having a fluid tight sealwith said wall, the end of the tube outside of the container projectingfrom the wall and having screw threads on its projecting end, a closedcap screw threaded on the tube and having a top portion overlying theopen end of the tube, valve means within the As mentioned above, thevessel is charged with the volatile substance and the insecticide orother electedmaterials, while the volatile substance is in liquid formfor which purpose the substance may be at a low temperature. The'stopplate 24 may be attached to the container at the time and by theoperation of sealing the top plate 3 after the .vessel has been charged.Preferably, the

arrangement of the cap and the packing is such 7 that when the cap isscrewed down to tightly engage the ball 16 with the seat H, the packinghas been compressed to some extent. When the cap is screwed down tightlyagainst the ball, the packing material has been compressed by about twofull revolutions on the threads l2. Due to the fact that the spray tubehas a small interior diameter, an opening at the valve seat 5!suflicient for the full capacity of the spray tube may be obtained byonly a partial revolution of the cap l5. In this manner, even though theball valve is fully open, to the capacity of the spray tube 20, thepacking material remains compressed thus maintaining, at all times, atight seal against the tube 6 to prevent leakage of the substancethrough the screw threads and packing.

When the vessel is initially charged the parts are intended to be in theposition as substantially shown in Figs. 2 and 3 with the ball valve IEseated tightly on the seat I 1. This provides an effective seal forholding the contents in the vessel under the pressure developed. Thepacking I i has been compressed as above pointed out and the tube 20 isso positioned as to engage the stop plate 26 to prevent the unscrewingaction of the cap 15. When the device is to be used, the operator oruser bends the spray tube 20 upwardly as indicated by the full-lineposition of the tube as indicated in Fig. 4, so that the spray of thesubstance will pass over the top of the container. Now, by turning thenut l5 to efiect an unscrewing action, say for example, a partial turnas illustrated by the dotted lines in Fig. 4, the pressure on the ballI6 is relieved and thus the valve is opened. However, the packing I lremains compressed to prevent leakage along the screw threads. Upon theopening of the valve. the pressure in the vessel causes a forcefuldischarge as indicated in Fig. 4. Some of the liquid may discharge upthrough the tube 8 from the bottom thereof while some Vapors may enterthe aperture 8 to effect an aspirating action. Thus, the dischargedliquid or mixture of liquid and gas carries with it some of theinsecticide for the spraying of spaces or objects.

I claim:

1. A container for holding and spraying a subcap engageable by the topof the cap to be urged against the open end of the tube to close thesame as the cap is turned on its threads, restricted passage means inthe cap for the discharge therethrough of substance from the containerwhen the cap is turned on its threads to release the valve means, and apacking member comprising, a body of resilient packing materialpositioned around the tube and between the cap and the said wall of thecontainer and normally compressed between the cap and the wall of thecontainer to provide a fluid tight seal between the cap and the tube,said packing member having an axial extent such that when the cap isretracted from the wall of the container by the turning of the same onits threads, the packing member remains compressed to, at all times,maintain a fluid tight seal between the cap and the'tube.

2. A container, for holding and spraying substance such as a volatileliquid carrier and an insecticide, a tube extending through and sealedto awall of the container, valve means associated with the tubeincluding an element rotatably mounted on the projecting end of the tubeand turnable in one direction to close the valve means and turnabl inthe opposite direction to open the valve means, a spray tube mounted onsaid element and arranged to communicate with the first mentioned tubewhen the valve is opened, said spray tube extending laterally from thefirst mentioned tube, and an abutment secured to the exterior of thecontainer and positioned in the path of the spray tube upon rotation ofthe cap, whereby to engage the spray tube and lock the cap againstrotation to thereby maintain the valve closed, said spray tube beingbendable so that it may move past the abutment upon rotation of the cap.

' RICHARD H. LINDSEY.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS

